PENERAPAN TEORI FRACTAL UNTUK MENENTUKAN KURVA RETENSI AIR PADA ENTISOL TANPA OLAH TANAH
ABSTRACT: The analysis of soil
characteristics are time consuming, cost highly, and the results are
qualitative. Analysis of soil characteristics might be conducted through the
fractal theory. Fractal description of soil based on the pore space and the
distribution of particles is a useful way to make quantitative analysis of soil
structure.D value is determined by a mathematical equation of the curve of
water retention. The water retention curve is obtained from some values of D
and then compared to the data from entisol soil analysis. The results are
calculated based on the size and the mass class cumulative value obtained from
fractal dimension (Dm) estimation of 1.87 ± 0.225. The water retention curve models are obtained
with a quite good value at D = 2.052.
There is a converse relationship between water content and water
suction. The greater water content, the
less water suction, and vice versa.
This is shown in the regression linier model equation of y = 12744x2 -
8666x + 1239.6 with a determination coefficient R2 = 0.8252. The value of water retention from the model
is approximate the analytical data as shown in the linear regression from
analysis of soil y = 12910x2 - 8751.9x + 1222 with determination coefficient R2
= 0.805. The linear regression equation
of the model is y = 12744x2 - 8666x + 1239.6 with a determination coefficient
R2 = 0.8252.
Key word: fractal theory,
water retention, entisol soil
Penulis: Ruslan Wirosoedarmo,
Bambang Suharto, Cendra Irawan
Kode Jurnal: jppertaniandd090026
